Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Array Iteration Methods Array Manipulation Transform Array Items with map()

Posted by Khumoyunmirzo Nosirov
Khumoyunmirzo Nosirov
8,689 Points

Why my code is running differently , it shows error

const strings = ['1','2','3','4','5']; const priceToDollars = price => '$${price.toFixed(2)}'; const displayPrices = prices.map(priceToDollars); console.log(displayPrices);

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

There's a few issues to fix:

  • the code calls .map on "prices", but no identifier named "prices" has been defined
  • the array named "strings" is never used, should that be "prices"?
  • but if so, "toFixed" is not a method for strings — it only works on numbers
  • a template string must be enclosed by accents (`) instead of apostrophes (')